GreenCleanFX, which has been re-launched by BioSafe, is effective for green water algae and deeper water as it sinks to the bottom. It will not affect pH levels and continues to work up to 48 hours after application. Featuring low application rates, GreenCleanFX is an activated peroxide commercial strength liquid algaecide; which means no harsh chemicals in ponds. GreenCleanFX meets the National Organic Program Standards for sustainability, is EPA registered, and made in the USA.GreenCleanFX Liquid Algaecide is available in 16 fl. oz. and 32 fl. oz Tip ‘n’ Pour containers with 1 oz. free and 1 gallon size.